288 P. T. Austen— Nitro-derivatives of Diphenylamine. 



With the hydrates and carbonates of the metals, the dipieryl- 

 amme yields in the same manner Bne salts. 



The most beautiful salt which I have yet obtained is the 

 a!!ii! ' m os in superb 



intense red transparent rhombohedrons (?'). Whether it is 

 ! ,ll ' 1:r ''- ] "i' only isomeric with the dyestuff •' Anrantia," which 

 is now produced on a large scale, I have not had an opportu- 



By treatment of the sodium salts of the dipicrylamines with 

 picrylchloride, a reaction takes place doubt h — . it , th. iorma- 

 tion of the tertiary picrylamine, N(C 6 H*(N0 2 ) 3 ) 3 . 



Immediately after the publication of my preliminary notice, 

 nmounced some new nitrodiphenylamines which he 

 i! by nitrition of m the rnethyl- 



c 1 '"' ' mn - ' 'n elimin.'Ht'd during the operation. + 



The following table will show the various nitrodiphenyl- 

 amines known, their method of preparation, and properties. 



( c*h* Hofmann, HNO 3 on 



(CO.C'IP ^"*0 ^CO.CH' 



, pejjs Light-yellow crystals. 



"H'(NO-0 



--;:■■ 



Deep yellow cry 



with metallic blue 



T-yeUow -0 



_ Clemm, C«H^NO*) J Br on C«H* 



solution of aniline. Fuses at 156 

 * Ber. Chem. Ges., yii, 1399. ~ 15 



dinhln e i ell,nmat ! on of a group during nitrition is quite frequent. Tribrommetbyl- 



"•■vrt with the sulpho-group d S.ilphonic acid 



:. . . ' ■ ■ ■ ' ■ ■■ : ; v 



i- 

 : 



■ ■ . ... , . ... ■ ....^ ;- 



* .'. ,. .: ' ■.■,■•:.■:<; 



"■'.:■'. /,.-'■: ' ; - ' 



r.:-r ', '.■ .'". . - ' ■-■- ■ ' "' ' : ^ '- ""' ; ■■ "J 



dues of diphenyl, Fittig (ibid., cxxiv, 275) 



